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Date and Time of the Query: 2019-03-22 T04:15:54 PDT
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For refcode 1988ApJ...330..684K:
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1988ApJ...330..684K H I OBSERVATIONS OF THE ELLIPTICAL GALAXIES NGC 2974 AND NGC 5018 D.-W. KIM University of California, Los Angeles P. GUHATHAKURTA Princeton University J. H. VAN GORKOM National Radio Astronomy Observatory M. JURA University of California, Los Angeles AND G. R. KNAPP Princeton University Received 1987 November 16; accepted 1988 January 8 ABSTRACT We present the results of {lambda}-21 cm H I line observations of the elliptical galaxies NGC 2974 and NGC 5018, for which IRAS observations show strong 100 micron emission. H I was detected in NGC 2974 and marginally in NGC 5018. The distribution of the H I in NGC 2974 is regular and is consistent with a rotating disk or ring parallel to the galaxy's major axis; this stands out in contrast to most other ellipticals where the gas distribution is not aligned with the optical galaxy. The total mass of H I is ~7 x 10^8^ M_sun_ (D ~ 22.5h^-1^ Mpc), and the rotation velocity is ~360 km s^-1^. In the case of the shell galaxy NGC 5018, there is clear indication of interaction with its spiral companion NGC 5022-gas appears to be flowing between the spiral galaxy and NGC 5018. Several blobs of H I are marginally detected within a few arcminutes of the optical center of NGC 5018. Three other H I features, one not associated with any visible galaxy, are detected in the NGC 5018/5022 group. Despite the contrast in their surroundings, the isolated elliptical NGC 2974 and the group member NGC 5018 both contain cold interstellar matter. Subject headings: galaxies: individual (NGC 2974, 5018, 5022) - galaxies: interstellar matter - infrared: sources - radio sources: 21 cm radiation
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